Machine for coating blanks with paraffin



F. P. VAVRA. MACHINE FOR comma BLANKS WITH PARAFFIN,

APPLKCATHJN FILE-D -AUG- 9, 1918- wm'm 9., 1 9mm. July fi mm,

4 SHEETS-SHEEF F. P. WWW. MACHINE r012 co/mme BLANKS WITH PARAFFIN. APPLICATION HLED AUG-9. 191B.

Patented July 1133 129 4 SHEETS-SHEET 3.

F P'. VAVRA. MACHINE FUR COATING BLANKS WITH PARAFF|N.-

APPLICATION FILED Auelsfwls.

' Pmmm July fi WW0 NI [ll "nate identical parts EMANJE'K JP. 1711117133, U13 CIClEllitU, ILLINOIS.

MACHINE F 013) COATING PLANES WITH PARAJFJFIN.

naaarm,

fipecification of 'ltetters Patent.

Patented July 6, 12211..

Application filed August a, 1913. Serial No. 219,156.

To all whom it may concern: 7

Be it known that l, FRANK P. Wavna, a

citizen of the United dta'tes, and a'resident of Cicero, in the county of Cook and Eatate of llllinois, have invented certain new and useful Improvements in Machines for Coating Blanks with Paraffin, of which the following is a full, cleanafid exact spec1fication.

My invention is concerned with machines for coating cartons with paraffin, of the general type shown in the Vavra Patent 1,198,97 6, and is designed to produce a machine of the class described that shall be simple in its construction, and yet capable of doing as good work as a more oomphcated one.

It is further concerned with a machine of the class described in which the position of the final gaging or parafiin applying rolls can be adjusted so that the blanks will be accurately discharged into the cooling water in position so that they will be seized by the conveying cords without the necess ty of employing any guides between said rolls and. the conveying cords.

ft is further concerned with a novel structure whereby one of the gaging rolls can be supplied with its liquid paraffin from above instead of depending for its supply upon the coiiperating lower roll which dips into a araffin vat beneath it.

lt is further concerned with an upper engaging roll that is supplied with steam on its interior so that the paraflin carried thereby cannot harden prematurely and thus prevent the top side of the carton from being properly coated.

It is further concerned with certain novel combinations and details of construction, all of which will be described at length in the body of the specification and particularly pointed out in the claims.

To illustrate my invention, 1 annex hereto four sheets of drawings in which the same reference characters are used to desigin all the figures, of which--- Figure 1 is a side elevation of one end of the machine containing my invention;

'lFig. 2 is a top plan view of the same;

Fig. 3 is a central vertical section on the line 3-3 of h ig. 2; and

Fig; '41 is a substantially vertical section on the line ted of Fig. 1.

lln carrying out my invention, ll employ a cast iron frame 10, part of which is shown in the drawings, and in one end of said frame ll mount a tank 11, which carries an ample supply of cold water for chilling the blanks after they have been paraflined in the customary manner, and in this tank 11 at the end adjacent the coating machine, 1 journal a pair of rollers 12 and 13, which are driven by suitable connections, not shown, from the coating machine proper, and associated with these rollers 12 and 13 are a plurality of strings or belts 1 1 and 15, moving as indicated by the arrows in Fig. 3, and serving to receive the cartons which have just been coated with the melted paraffin, and to carry them through the bath so as to chill and fix the paraffin on the faces of the cartons.

Secured upon the end of the frame away from the tank 11 is a pair of fixed brackets or castings 16 and 17, which are generally symmetrical, and which have journaled therein the shaft 18 for the feed roll 19 which cooperates with the cartons 20 piled on the feed board 21, which is supported on the extensions 22 of the brackets 16 and 17. dour'naled in bearings 23 and 2t secured on the top of the frame 10 to the left of the brackets 16 and 17 is the main shaft 25, which has secured thereon between the bearings the lower gaging roll 26, and has secured thereon outside of the frame the spur gear wheel 27 and the beveled gear wheel 23, the latter being connected by gearing, not shown, with the driving mechanism for the rolls 12 and 13, and other rolls, not shown, in the cooling tank 11. The outer end of the shaft has secured thereon the necessary belt pulley or pulleys 29 to which the driving belt 30 is applied in the customary manner. wheel 27 meshes with an idle spur gear wheel 31 suitably journaled upon a stud mounted in the adjacent end of the frame 10 and bracket 17, and meshing with a spur gear wheel 32 secured on the adjacent end of the feed roll 33, which is journale'd in suitable bearings formed in the brackets 16 and 17. A pair of idle spur gear wheels 34 and 35 journaled upon suitable stud bearings carried by the bracket 17 connect the spur gear wheel 32 with the spur gear wheel 36 secured on the adjacent end of the shaft 18 which carries the blank feeding roller previously mentioned. An adjustable shaft or rod 37 is secured in the desired position of As seen in Fig. 3, the spur gear,

adjustment in its split bearings 38 and 39 formed on the brackets 16 and 17 by the bolts 40, and has fulcrumed thereon the pairs of guide fingers 41 which have the idle feeding rolls 42 journaled therein between adjacent pairs of the guide fingers and resting 1 on top of the driven feed roller 33. Guide fingers 43 extend from the end of the board 21 to the roller 33, and another set of wire guide fingers 44 are secured by coils upon the spacing rod 45 extending between the brackets 16 and 17 beneath the ends of the fingers 41. By means of the feed rolls and guide fingers thus far described, it will be obvious that the blanks fed into the machine either by the action of the roller 19, or by hand, will be carried between the gaging roller 26 and the companion gaging roller 46 the shafts for which are journaled in the bearings 47 and 48 which are mounted to slide in the vertical guideways 49 formed in the swinging brackets 50 and 51 which are adjustably mounted to swing on the shaft 25, as best shown in 'Fig. 4. The roll 46 is geared to the roll 26 by the spur gear wheel 52 secured on the outer end of the shaft 53 of the gagin roll 46 meshing with the spur gear wheel 2 secured on the shaft 25 of the gaging roll 26. The bearing brackets 50 and 51 each have the recesses 54 therein at the bottom of the guideways 49 with the helically coiled expanding springs 55 mounted therein and reacting against the movable bearings 47 and 48. The bearings 47 and 48 are provided with the upwardly projecting lugs 56 surrounded by one end of the helically 'coiled expanding spring 57, the other end of which surrounds the reduced end 58 of the set screws 59,.and cooperate with the collar 60 secured on said set screw which is threaded through the removable caps 61 applied to the upper ends of the brackets 50 and 51, so that by adjusting the set screw 59, the degree of pressure of the gaging roll 46 on gaging .roll 26 can be adjusted to a nicety.

The gaging roll 26 dips into and is supplied with parafiin 62 in'the paraffin supply tank 63, which is secured between the sides of the frame 10, and is provided with the steam jacket compartment 64, which is supplied with live steam through the pipe 65 opening into the bottom thereof and from which the water of condensation escapes through the companion pipe 66 likewise 0 ening into the bottom thereof. The para is kept at the proper level by an overflow ipe 67 which extends up through the paraf n 62 and opens into the pipe 68 which extends through the steam jacket, as clearly shown in Fig. 3.

While the gaging rolls 46 might be supplied with the melted paraflin by the action of the lower gaging roll 26 carrying a supply on its 'felt covering 69 up to the felt covering 70 of the roll 46, I preferably furnish an independent supply of )arallin through the following connections. founted in the top of the brackets 50 and 51 is a steam jacket cylinder 71, which is supplied with live steam by a short pipe 72 passed through the bracket 51- and connected by the elbow 73 with a pipe 74 leadin to any suitable source of steam supply. The pipe '74 should be provided with a flexible connection to take care of the movement of the brackets 50 and 51 in the adjustment to be hereinafter explained. Mounted concentrically within the steam jacket cylinder 71 is a parafiin supply cylinder 75, which has a line of nipples in the bottom thereof extending down through a set of registering apertures in the bottom of the cylinder 71 so as to deliver the paraflin from the nipples 76 between the gaging roll 46 and the companion roll 77, which will be employed when the paraffin supply cylinder is employed. The cylinder 7 5 is closed at its end 78, while a pipe '7 9 opens into its other end through the bracket 50, and this pipe 79 is provided with a shut-off valve 80 b which it is connected to the elongated -shaped pipe 81, the lower end of which is mounted so as to be capable of turning slightly in the elbow 82, secured on the upper end of the parafiin supply ipe 83, which will lead to a supply of para 11 under pressure, so that by open-- ing the valve '80, the desired amount of parafiin can be allowed to flow into the cylinder 75, and be discharged therefrom throu h the nipples 76 between the rolls 46 and 77. The elbow 82 has a branch pipe 84 leading therefrom and supplied with the shut-o valve 85 by which it is connected to the pipe 86 which extends into the machine and empties into the tank 63.

The roll 77 is like the gaging rolls 26 and 46, a hollow metal roll with a coating 87 of felt or s6me similar fiber, and is secured on the shaft 88 which is journaled in a pair of movable bearings 89 mounted in the guideways 90 formed in the brackets 50 and 51 and extending at right angles to the guideways 49. A recess 91 is formed in each of the brackets at the base of the guideways 90 and helically coiled expanding springs 92 are interposed between the apertures 91 and the adjacent sides of the bearings 89, the opposite sides of which are provided with lugs 93 which are encircled by the adjacent end of the helically coiled expanding spring 94, the other ends of which surround the reduced ends of the set screws 96 which are threaded through the cap pieces 97 secured on the brackets 50 and 51. The adjacent ends of the springs engage the collars 98 secured on the set screws 96, so that by adjusting the set screws the roll 7 7 can be held with the desired tension against the roll 46, with which it moves at the same peripheral lid naaavia velocity through the meshing of the spur gear wheel 99 secured on the end of its shaft meshing with the spur gear wheel 52 secured on the shaft 53 of the gaging roll 16.

By means of the connections thus described, it will be obvious that f can keep the gaging roll 16 supplied with any desired amount of paraffin applied to its fiber covering without depending upon the lifting action of the gaging roll 26.

As it is desirable to keep the gaging roll 16 hot so as to keep the paraffin thereon in a liquid state, especially when it is supplied from the gaging roll 26, 1 preferably supply the hollow interior of the roll 46 with live steam through the hollow axlejournaled in the bearing 48. This hollow axle is connected by the packing gland 101 with the reduced end 102 of an elbow 103, the

joint being made steam-tight by the packing 10a in the gland 101. A pipe opening into the bottom of the elbow 103 leads to a source of steam supply, and the pipe 105 must have a joint therein so that the frames 50 and 51 can swing for adjustment. remove the water of condensation, ll extend up through the pipe 105 a smaller pipe 106, which has the horizontal portion 107 extending through the male 100 and the downturned portion 108, the open end of which reaches to near the bottom of the hollow roll at, so that the water of condensation may be siphoned out from said roll whenever it accumulates. I

As it is important to deliver the cartons discharged from between the gaging rolls 26 and 46 as directly'as possible to the receiving angle of the cords 141 and 15, 1 provide means forv varying the angle at which the frames 50 and 51 carrying these rolls shall stand, and for this purpose 1 provide the links 109 pivotally connectedwith each of the frames 50 and 51 to the handle levers 110, which are rigidly secured on the shaft 37. When the angle of the frames is to be changed, ll loosen the bolts 10 and move the handles until the blanks are under the operating conditions then present,discharging properly into the receiving angles of the cords 141- and 15, after which ll tighten the ltoolts 410 and thus secure the frame in posiion.

The gaging rolls 26 and 4:6 are shown as hollow metal rolls and necessarily have coverings 69 and 70, respectively, of felt or some equivalent material, of say one-quarter of an inch in thickness, and these metal rollsv so covered with felt and pressed together by the springs 57, act to gage the thickness of the coating of paraflin applied to the cartons in a manner well known tothose skilled in the art.

While 1 have shown anddescribed my invention as embodied in the form which 1 at present consider best adapted to carry out its purposes, it will be understood that it is capable of modifications, and that 1 do not desire to be limited in the interpretation of the following claims except as may be necessitated by the state of the prior art.

What ll claim as new, and desire to secure by Letters Patent of the United Etates is:

1. In an apparatus of the class described,

the combination with a supply tank, of a gaging roll rotating above but dipping into the liquid, a second gaging roll above the first geared thereto and spring pressed into substantial engagement. therewith, means for feeding cartons between the rolls, and means for supplying steam to the interior of the upper roll for the purpose described. 2. in an apparatus .of the class described, the combination with a supply tank, of a gaging roll rotating above but dipping into the liquid, a second gaging roll above the first geared thereto and spring pressed into substantial engagement therewith, means for feeding cartons between the rolls, a spreading roll-journaled at one side of the top roll, geared thereto and spring pressed into engagement therewith, and means for dropping melted paraffin into the angle between the last mentioned rolls.

' 3. lln an apparatus of the class described, the combination with a supply tank, of a gaging roll rotating above but dippinginto the liquid, a second gaging roll above the first geared thereto and spring pressed into substantial engagement therewith, means for feeding cartons between the rolls, a spreading roll journaled at one side of the top roll geared thereto and spring pressed into engagement therewith, a tube extending above the angle between the last mentioned rolls and having perforations in its under side, and means for keeping up the temperature of the tube.

4t. lln an apparatus of the class described, the combination with a suppl tank, of a gaging roll rotating above ut dipping into the liquid, a second gaging roll above the first geared thereto and spring pressed into substantial engagement therewith,

means for feeding cartons between the rolls,

a spreading roll journaled at one side of "Ilia till:

lltllli lift the top roll geared thereto and spring pressed into engagement therewith, a tube extending 'above the angle between the last mentioned rolls and having perforations in its underside, and a steam jacket surrounding the tube for the purpose described.

5. in an apparatus of the class described, the combination with a parafltin supply tank, of a gaging roll journaled aboveand dipliltll llllh ping into said tank, a framework swinging a about the axis of the gaging roll as thevcenter, a second gaging roll journaled in the swinging framework and spring pressed into substantial engagement with the first roll, gearing between said rolls, and means for securing the frame in any adjustment, substantially as and for the purpose described.

6. In an apparatus of the class described, the combination with a paraffin supply tank, of a gaging roll ournaled above and dipping into said tank, a framework swinging about the axis of the gaging roll as the center, a second gaging roll journaled in the swinging framework and spring pressed into substantial engagement with the first roll, gearing between said rolls, a shaft mounted in bearings outside of the swinging framework, arms secured to the end of the shaft, links connecting the arms to the swinging framework, a handle secured to the shaft, and means for clamping the. shaft in any adjustment.

In an apparatus of the class described, the combination with a parafiin supply tank, of a gaging roll journaled above and dipping into said tank, a framework swinging about the axis of the gaging roll as the center, a second gaging roll journaled in the swinging framework and spring pressed into substantial engagement with the first roll, gearing between said rolls, a shaft mounted in bearings outside of the swinging framework, arms secured to the end of the shaft, links connecting the arms to the swinging framework, a handle secured to the shaft, means for clamping the shaft in any adjustment, a feed roll between the shaft and the first gaging roll, gearing between said last mentioned gaging roll and the feed roll, guide brackets loosely pivoted on the shaft, and feeding disks journaled on the guide brackets above the feed roll for the purpose described.

8. In an apparatus of the class described, the combination with a pair of gaging rolls geared together, means for supplying said rolls with melted parafiin, a feed roll in advance of but substantially on the leveLof the lower gaging roll, gearing between the feed roll and the gaging rolls, a shaft in advance of and above the feed roll, guide brackets loosely pivoted on the shaft and extending across the feed roll substantially to the gaging rolls, and feeding disks journaled on the brackets and resting on the top of the feed roll.

9. In an apparatus of the class described, the combination with a pair of gaging rolls geared together, means for supplying said rolls with melted paraffin, a feed roll in advance of butsubstantially on the level of the lower gagingroll, gearing between the feed roll and the gaging rolls, a shaft in advance of and above the feed roll, guide brackets loosely pivoted on the shaft and extending across the feed roll substantially to the gaging rolls, feeding disks journaled on the brackets and resting on the top of the feed roll, and guide wires extending from the feed roll to the gaging roll.

In witness whereof, I have hereunto set my hand and affixed my seal, this 7th day of August, A. D. 1918.

FRANK P. VAVR-A. [Ls] Vitnesses C. M. STUMCKE, JNo. G. ELLIO'I'I'. 

